{{Dialogue a-b-a|Argus Filch|What are you doing?|Harry Potter|Nothing.|Nothing! A likely story! Sneaking around on your own -- why aren't you in Hogsmeade buying Stink Pellets and Belch Powder and Whizzing Worms like the rest of your nasty little friends?|Filch grilling Harry about why he wasn't in Hogsmeade.|Harry Potter and the Prisoner of Azkaban}}

{{Dialogue a-b-a|Argus Filch|What are you doing?|Harry Potter|Nothing.|Nothing! A likely story! Sneaking around on your own -- why aren't you in Hogsmeade buying Stink Pellets and Belch Powder and Whizzing Worms like the rest of your nasty little friends?|Filch grilling Harry about why he wasn't in Hogsmeade.|Harry Potter and the Prisoner of Azkaban}}

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'''Stink Pellets''' are a joke product that presumably releases an unpleasant odour. They were sold in [[Diagon Alley]] in [[Gambol and Japes Wizarding Joke Shop]], and in [[Hogsmeade]], most likely at [[Zonko's Joke Shop]]. They are not tolerated by [[Argus Filch]].<ref name="pa8">''[[Harry Potter and the Prisoner of Azkaban]]'', Chapter 8 - (''Flight of the Fat Lady'')</ref> Their usage is similar to that of a [[Dungbomb]], another item not tolerated by the [[Hogwarts School of Witchcraft and Wizardry|Hogwarts]] caretaker.

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'''Stink Pellets''' are a joke product that presumably releases an unpleasant odour. They were sold in [[Diagon Alley]] in [[Gambol and Japes Wizarding Joke Shop]], and in [[Hogsmeade]], most likely at [[Zonko's Joke Shop]]. They are not tolerated by [[Argus Filch]]. Early in the [[1993-1994 school year]], [[Fred Weasley]] was running low on these and wanted to get some in Hogsmeade.<ref name="pa8">''[[Harry Potter and the Prisoner of Azkaban]]'', Chapter 8 - (''Flight of the Fat Lady'')</ref> Their usage is similar to that of a [[Dungbomb]], another item not tolerated by the [[Hogwarts School of Witchcraft and Wizardry|Hogwarts]] caretaker.

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In [[1996]], as the tyranny of [[Dolores Umbridge]] reached a new level with her becoming [[Headmaster|Headmistress]], the students of Hogwarts revolted en masse, and Dungbombs and Stink Pellets were dropped in the halls with such frequency that it became the new fashion for students to use the [[Bubble-Head Charm]] just to ensure that they had a supply of fresh, clean air.<ref name="OP30">''[[Harry Potter and the Order of the Phoenix]]'', Chapter 30 - (''Grawp'')</ref>

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==Behind the scenes==

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*''[[Mucus Projectum]]'' was a spell planned for the video game adaptation of ''Harry Potter and the Prisoner of Azkaban'', but was cut from the final version of the game. It is possible that the spell would have a similar effect to the manner that Stink Pellets are used in the final game.

In 1996, as the tyranny of Dolores Umbridge reached a new level with her becoming Headmistress, the students of Hogwarts revolted en masse, and Dungbombs and Stink Pellets were dropped in the halls with such frequency that it became the new fashion for students to use the Bubble-Head Charm just to ensure that they had a supply of fresh, clean air.[2]

Mucus Projectum was a spell planned for the video game adaptation of Harry Potter and the Prisoner of Azkaban, but was cut from the final version of the game. It is possible that the spell would have a similar effect to the manner that Stink Pellets are used in the final game.